Chain-block hoist.



F. A, HOWARD. CHAIN BLOCK HOIST.

APPLICATION FILED Hume, 1914.

Patented Dec. 29, 1914.

3 SHEETS-SHEET l,

i IVW HE NORRIS PETERS C0.. PHOTO-LITHFL, WASMINQ roN, n. l

RA. HOWARD. CHAIN BLOCK HOIST. APPLICATION FILED PBBJG, 1914.

Patented Deo. 29, 1914.

3 SHEETS-SHEET 2.

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THE MORRIS PETERS cb.. FHOTO-LITHO.. WASHINGTON. D. C.

F. A. HOWARD.

CHAIN BLOCK HOIST.

APPLICATION FILED FEBJG, 1914.

Patented Dep. 29, 1914;

3 SHEETS-SHEET 3.

@Qi/IM wow TATS EREDEEIGK A; HOWARD, 0E BEA-DING, PEnner-LvANIA.V

CHAIN-BLOCK HOIST.

Application flied February 1e, 1914. semina 818,821.

10 all whom t may concern.'

Be it known that I, FREDERICK A. How- ARD, a citizen of the United States, residing at Reading, in the county of Berks and State of Pennsylvania, have invented cer-l tain new and useful Improvements in Chain-` Block Hoists, of which the following is a specification.

My invention relates particularly to chain-block hoists, and is directed especially to that type of such devices as are'provded with motor-driven mechanism operativelyV connected with the hand-operated mecha-l nism, to actuate the lifting mechanism.

The principal objects ofmy invention are, to provide a hand-operated chain-block hoist vwith power-driven mechanism; to provide means for operatively connecting and vention; Fig. 2 is a plansectional View .of

disconnecting said power-driven mechanism i with the hand-driven mechanism; and. tol provide meansA for securely lholding said power-driven mechanism in different' posi.- tions.

S ecilicall stated m invention com rehends a hand-operated chain-block hoistv having a hand chain wheel provided with gear teeth, motor-driven mechanism having a gear operatively connected with the teeth on said hand chain wheel, and means for shifting said motor-driven mechanism into and out of operative engagement with ysaid hand chain wheel, whereby said hand chain wheel may he manually operated' said hoist taken on the line 2*2 in Fig. 1; Fig. 3 is a transverse vertical sectional view taken on the line 3-3 in Fig. 1; and Fig. 4c

is a fragmentary inverted plan view showing a modification of my invention.

In said figures, the side frames 5 and. 6 are connected `by the bolts 7 and are sup# ported by the hook S'having trunnions 19 mounted in suitable bearings in the respective frames. The mainl shaft 10 extends transversely through the side frames 5" and `6 and carries the pinion 11 in mesh with the gears 12 and 13 on theV respective shaftsl4' speeifieanon of Letters Patent. y i Panama@ Dec, 1914,'

and 15, which carry gears 16 and17` in toothed engagement with the internatgearI` 18. The gear 18 is mounted on the sleeve 2O which carriesv the lifting sheave 22 upon which tlie'lifting chain l23 4is carried. vThe main shaftlO carries the hand chainl wheel 25 which is arranged to be manually actuated bythe endless chainA 26. The 'mech-y anism thusfarfdescribedv embodies a well-` lmown" construction `of chain-block hoist.

As best' shown in Fig. 2, the hand chain wheel 25 isA provided with beveled y.gear

teeth 28, cut" on thel inner face thereof, which are arranged toengage` with the beveled teeth 29 of the gear 30, whichfis loosely mounted to rotate'on the shaft 31. The gear 30` is provided with-internalteeth 32 in toothed engagement `withthe gears 33I and 34:' on the shafts 35 and 36, which carry gears; and 39 in toothed engagement with p1n1on42 which is secured on theshaft t 31. Saidvshaftl is provided with the gear the 44, which is in mesh with the gear ton the shaftv 46 of the electric` motor the .side frames 5 and 6. v

The'differentialftrain ;of gearing coni-4 prsng the gears 30? 331x345 39, ylIll 4:4 and their shafts 31', 35 and 36, are mount-. ed in the ca sing-B, whichis provided; with"y the carriageil having the grooves 55 in en gagement witlithe guidesl57 on the 'inner faces ofV the respective frames 5 and 6,; as

bestshown in' Fig. 3, and mounted to slide longitudinally4 thereon, so astofshift the gear Olintoand out of operative"engage on the hand chain" f m'entwith the teeth 28 wheel 25'.I

In the form` ofmy inventionishowii -in f Fig. 1,*the frames 5 and 6 are connected Aby 50 carried by a transverse plate 60 in which is mounted n; n

the screw 61 in threaded `engagement with the carriageel Said screw is provided with a collar 63 arranged'g'to prevent its longitudinal movement, and hasthe hand wheel 65 mounted 1 thereon, w hereby frames 5' and 6 in either its operative for inoperative position 'by the setescrews 67 eir-V tending through said frames and in threaded engagement therewith. f

The casing r53 inclosin'g the train of differential gears on the carriage ljcarries the controllery mechanism 69. which may kbe electrically connected'` in any suitable and t it may be con. l veniently rotated to effect the longitudinal j movement'of said carriage. The carriagep may be secured in iXed relation to the side f,

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Well-known manner With the motor 50. Said controller mechanism is provided With the shaft having the operating lever bar 7l, to the free ends of Which may be connected the depending controlling chains 72 and 73 for its convenient actuation by the operator.

ln the form of my invention shown in Fig. i, the carriage 5.2i is provided With a triangular recess 75, the Walls of which are arranged to be engaged by the cam 76 on the hand lever 77 Which is pivotally mounted on the shaft 78, said carriage being held in either its operative or inoperative position by the set-screws 7 9.

My invention is especially advantageous in that While the motor-driven mechanism is always in a position to be readily connected With the lifting mechanism, it may be as readily disengaged therefrom by merely shifting it to the inoperative position illustrated in Fig. el, wherein the teeth of the gearing train are out of engagement With the teeth of the hand chain Wheel, so as to permit the free rotation of said hand chain Wheel independently of said motor-driven mechanism.

l do not desire to limit my invention to the precise details of construction and arrangement herein set forth, as it is obvious that various modifications may be made therein Without departing from the essential features of my invention as defined in the appended claims.

Having thus described my invention, l claim:

l. ln a chain-block hoist, the combination with a frame, of al lifting chain sheave, a train of differential gearing connected to rotate said sheave, a hand chain Wheel connected With said gearing and having gear teeth thereon, a second train of differential gearing having a gear arranged to mesh With the' gear on said hand chain Wheel, a motor connected to drive said second gearing train, and means for shifting said second gearing train to operatively engage and disengage its gear With the teeth on said hand chain Wheel.

2. In a chain-block hoist, thefcombination with a frame, of a lifting chain sheave, a train of dinerential gearing connected to drive said sheave, a hand chain Wheel connected with said gearing train and provided with gear teeth, a reciprocatory mounting movably carried by said frame, a second train of differential gearing carried by said mounting and having a gear arranged to engage the teeth on said hand chain Wheel, a motor carried by said frame, means operatively connecting said motor to drive said second gearing train, means operative to shift said mounting on said frame to opepleis ef this patent may be attained for said second gearing train with the teeth on said hand chain Wheel, and means arranger to secure said mounting in fixed relation `vith said frame.

3. in a chain-block hoist, the combination with a frame having guides, of a main driving shaft, a lifting chain sheave carried by said shaft, a train of differential gearing operatively connected with said shaft, a hand chain Wheel connected to drive said gearing and having beveled teeth disposed thereon, a carriage slidably mounted in said guides, a second train of differential gear ing mounted on said carriage and having a. beveled gear arranged to engage the beveled teeth on said hand chain Wheel, a motor carried by said frame operatively connected to drive said second gearing train, and means arranged to reciprocate said carriage on said frame to operatively engage and disengage said second gearing train from the teeth of said hand chain Wheel.

ln a chain-block hoist, the combination with a frame, of a lifting chain sheave, a train of differential gearing operatively connected to rotate said sheave, a hand chain Wheel operatively connected with differential gearing and having beveled gear teeth mounted thereon, a carriage slidably mounted on said frame, a second train of differential gearing mounted on said carriage, a screw having a hand Wheel mounted to rotate in said. frame and having means to prevent it from axial movement, and having threads in engagement with said carriage and arranged to shift it into position to operatively engage and disengage the second gearing train With the teeth of the h l chain Wheel, and a motor carried by said frame operatively connected to drive said second gearing train.

5. In a chain-block hoist, 'the combination With lifting mechanism, of a hand chain Wheel operatively connected to actuate said lifting mechanism and having gear teeth mounted thereon, a carriage slidably mounted on said frame, a train of gearing mounted on said carriage and having a gear arranged to engage the teeth on said hand chain Wheel, a motor carried by said frame oaerativel connected with said seal-inni train, and hand operated means to shift the gearing train into and out of operative engagement with the teeth on said hand chain Wheel.

In Witness whereof, l have lhereunto my hand this lllth day of `February, A. D.,

FREDERTLCK A. HWAl-l-D. Witnesses f ED. A. KELLY, MARY E. STAUFFER.

ve cents each, by addressing the Commissieaer ef atenca, Washington, D. G. 

